The defense played a huge role, as it completely shut down Detroit after giving up a touchdown and a field goal in the first two drives.
The key for the defense was a ferocious pass rush that produced eight sacks — and incredibly not one of them was by Jason Taylor. Vonnie Holliday, Matt Roth and Zach Thomas each had two sacks, while Kevin Carter and David Bowens both had one.
The defense also forced two turnovers, including an interception by safety Renaldo Hill that set up the touchdown that gave the Dolphins a 14-10 lead heading into halftime.
The lead could have been bigger, but Harrington, who finished 19 of 29 for 213 yards, made his one mistake of the game when he threw an interception with the Dolphins in field goal range.
The Dolphins enjoyed great field position throughout the second half, and their next drive started at their own 40 and ended with Harrington's second touchdown pass to Booker, this one good for 24 yards on third-and-4.
Sammy Morris' 55-yard run up the middle set up the final score, a short field goal by Mare, and the defense took care of the rest, including Roth forcing a Jon Kitna fumble when he stripped the ball from behind.
Morris got extended playing time in the second half after Ronnie Brown left the game with a hand injury.
But it didn't matter who was carrying the ball for the Dolpins, there were gaping holes all day and plenty of yards to be gained. The Dolphins finished with a season-high 186 yards rushing, while holding Detroit to a measly 21 yards on 10 carries.
But the big story from the start of the day was Harrington, whose numbers could have been a lot better had it not been for three dropped passes, two by rookie Derek Hagan and one by Booker.
In the end, though, those didn't matter and Harrington walked away from Ford Field with a big smile on his face and a wet jersey after being doused with Gatorade by offensive linemen Rex Hadnot and Kendyl Jacox.
Harrington might not have had a sweeter day in his NFL career.